Reciprocating engine



c. s. CLARK RECIPRQCATING ENGINE Flled July s, 192? Aug. 26 1924.

Patented Aug. 26, 1924.

UNITED STATES CARL s. CLARK. or CLEVELAND. onio, Assienoa or ouaiiALr ToA.. ionr'nous, or CLEVELAND, onto.

RECIPRCCATING n'NGiNE.

Appneanon mea July 3, m22'. serial No. 572,620.

Be it known that I, CARL S. CLARK, a citizen of the United States,residing at Cleveland, in the county of Cuyahoga and State of Chio, haveinvented certain new and useful Improvements in Reciprocating Engines,of which the following is aspecificeton. I i

Thisinvention relates to reciprocating engines and is particularlyadapted for use with air hammers and the like. It can be used witheither compressed air o`r steam, but is particularly applicable for usewith compressed air.

In the drawings Fig. 1 is a sectional side elevation of the device; Fig.2 is a vertical sectional view through the moving parts showing theparts in one position and moving in the direction indicated by the arrowthe outer casing being omitted; and Fig. 3 is a view similar to Fig. 2showing the parts in another position and moving in the op positedirection as .indicated by the arrow.

The device consists of a cylinder 1 having its forward end 2 closed andhaving a rod 3 extending outwardly therefrom to which a hammer head orwhatever the device is used with may be attached. The opposite end isclosed by a plug 4 being screwed there-into and a hollow rod 5 ex tendsthrough this' plug and a stuffing box 6 is mounted thereon to preventany escape of air. The cylinder 1 is adapted to move back and forth uponthe hollow rod 5 and consequently the rod 3 and anything connectedthereto are moved back and forth.

In order to guide the cylinder and control it in its movement it ismounted in a hollow tube 7 having a bushed hole 8 in its forward endthrough which the rod 3 extends and works back and forth therein. Thetube 5 extends through a plug 9 in the opposite end of the tube 7 and isheld securely in said plug.

Mounted within the cylinder 1 is a reciprocating member 10 bored at eachend as indicated at 11 and 12 and having a partition 13 between thetwo.` bored ends 11 and 12, and said partition is bored as indicated at14 and the rod 5 extends through this bore 14: and is adapted to fitsnugly therein. The rod 5 has a shoulder 15 thereon which will strikethe partition 13 when the device is in the position shown in Fig. 2 andthe end of the rod 5 is closed by a screw 16 around which is mounted acollar 17, tlle outside diameter of which is about 'the saine diameteras the shoulder 15 and this collar 17 is adapted to engage the oppositeside of the partition 13'when the device is in the position shown inFig. 3. As willbe seen the shoulder 15 and the collar 17 limit thevmov'ement of lthe member 10. The forward end of the tube 5 has spacedports 18 and 13 therein,- the ports 18 being uncovered when the'devieeis in the position. shown inFig. 2 and the ports. 19 bei-ng uncoveredwhen it is in the position shown in Fig. 3.

The cylinder 1 has exhaust ports 2() and 21 therein which are adapted tobe covered or uncovered by the member 10.

This device operates as follows: The air hose is connected to the end ofthe hollow tube 5 as indicated at 22 and air passes through the bore 23of the tube 5, and out the ports 18 (Fig. 2) and forces the cylinder lin the direction indicated by the arrow in Fig. 2. While the cylinder ismoving forward the air trapped in the rear end thereof will becompressed and the cylinder will move forward until the port 2O ridespast the end of the member 10 when the air being fed through the ports18 will escape out the port 20 to the atmosphere through hole 30 inhandle tube 7. This will make the pressure on 'this end less than thepressure on the other end due to the air compressed therein. Then thecompressed air in the other end of the cylinder will cause the member 10to move forwardly into the position shown in Fig. 3 which will 'coverthe ports 18 and uncover the ports 19 and allow the compressed air to beadmitted to the opposite end of the cylinder 1 which will cause it tomove in the direction of the arrow in 9 Fig. 3 until the port 21 ridespast the end of the member 10 which will cause the air compressed in theopposite end of the cylinder to force the member to back into theposition shown in Fig. 2, etc.

It will be seen, therefore, that the outer tube 7 provides an enclosinghandle containing the reciprocating combined piston and cylinder 1 inwhich works the tubular con trolling valve member 10 governing the inletto and exhaust from the cylinder.

I claim:

1. In a motor, the combination of a reciprocating cylinder having spacedexhaust ports, a pressure supply pipe projecting into spaced inletports, and a tubular piston valve mounted to reciprocate between thepipe and the cylinder and controllingall of said ports.

2. In a motor, the combination o f a pressure supply pipe having spacedports in one end thereof, a cylinder mounted to reciprocate upon saidpipe and enclosing said end, and having spaced exhaust ports, and apiston valve mounted to reciprocate upon said pipe and within saidcylinder and controlling all of said ports.

3. In a motor, the combination of a pres sure supply pipe having spacedports near one end thereof7 a cylinder reciproeable upon said pipe andhaving exhaust ports in the side wall thereof spaced from each other andfrom the ends of the cylinder, and a hollow piston valve reciprocable inthe space between the pipe and the cylinder and controlling therespective ports, said piston valve being operated by compressiontrapped iny opposite ends of the cylinder.

4. In a motor, the combination of a pressure supply pipe having spacedports near one end thereof, a cylinder reciprocable upon said pipe andhaving exhaust ports in the side wall thereof spaced from each other andfrom the ends of the cylinder, and a hollow piston valve recip-rocablein the space between the pipe and the cylinder and controlling therespective ports, said piston valve being operated by compressiontrapped in opposite ends of the cylinder and stops on the pipe,Vlimiting the movement of the piston valve.

In testimony whereof, I affix my signature in presence of two witnesses.

` CARL'S. CLARK. Witnesses n L. A. RANsroRD,

JOHN A. BOMMHARDT.

